Merge changes I0867f694,I27481100,If5bc36c6,Iddc76053,Idc34f47b, ... into main

* changes:
  Implement the USD callbacks in aidl_manager.
  Setup USD callback infrastructure and function calls.
  Implement remaining USD methods in the Vendor Supplicant.
  Implement startUsdSubscribe in the Vendor Supplicant.
  Implement startUsdPublish in the Vendor Supplicant.
  Add temporary default implementation for the USD methods.